Zigzag-needle-operating mechanism for sewing-machines.



` EATENTED DEG 3E 190'?. L. ONDERBGNK. ZIGZA-G NEEDLE UPERATNG MECHANISMEUR SEV/UNG MACHINES.

AEPLIUATION FILED Mov. 9. 1901.

5 SHEETS-SHEET l.

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N0l872,675.. 1 ATENTBDnB0.3,19o7

L. ONDERDONK.

ZIGZAG NEEDLE PERATING MEGHANSM FOR SEWING MACHINES. PPLIUATION FILEDNov. o, 1901.

6 SHEETS-SHEET 2.

JM ual/WOA Noqs'izv. 11ATENTEDDEG-3, 1907.

- L. GNDERDONK.

2mm@ NEEDLE QPERAMNG MEGHANISM PGR SEWING MACHINES.

K .APPLIUATIOH FILED NOV. 9. 1901.

6 SHEETS-SHEET 3.

PATENTBD DEC. 3

i L. ONDERDONK. y ZIGZAG NEEDLE OPERATING MEGHANISM FOR-SEWING MACHINES.

APPLICATION FILED NOV. 9. 1901.

e EENS-SHEET 4.

PATENTBDDBG. '3,l wor/1 L, ONDERDONK. ZIGZAG NEEDLE OPBRATINGAMECHANISMFUR SEWING MAG EINES.

APPLICATION FILED NOV. 9. 1901.

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' PATENTE@ DEG. 8, 1907.

l L. ONDERDONK. ERATNG MEGHANISM FOR SBWI APPLIoMfIoN FILED Nov. a.1901.

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UNITE eiserne erro.

LANSING ON DERDONK, OF NEW YGRK, N. Y., ASSIGNOR TO UNION SPECIAL SEWINGMACHINE COMPANY, OI CIICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

Specification of Letters Paitent.

resented. nec. s, leo?. I

Applic'ntio'n tiled Noverlbl 9,1901- Sorial No. 814763. y

To all whom it ymay concern.:

Be it known that I, LANSING ,Onninnonm e `citizen of the United States,residing et New York city, in the county oi New York,

State of New York, have invented. certain This invention relates to whatis known es v n zie zag stitch sewing machine,

The objects of the invention ere, first, to provide it machine of thisclass with two independent needle bars, having means for imN partingindependent bodilynorizontel movement to thm in addition to the ineenswhich imparts the simultaneous ve r tical movement, and second, toprovide in such e machine means for varying or adjusting the seidindependent bodily horizontal movement of' the needle bers in order tovary the width. of the stitches and produce widely dii'l'ering patternsof stitches for ornamental and seeming purposes. These objects laccomplish hy the meclnmism illustrated in the eccompsi'iying dm ings,in which Figure 1 is :1y front elevation with the work plete broken awayto show the looper sind feed meelninism; Fig. 2 is e. horizontal sectionon line 2-2 ol Fig. l; Fig. is o. flete-il enlergod horizon tel sectionof the inside needle her carrier, its exis and a portion ol' the conmeeting rod; Fig. 4 is it transverse vertical sci-tion on lineAM-Jf ol`Fig. l, looking to the righi; Fig. 5 isnn end elevnlion of the heedendol` the machine; l? ig. (i is :in enlarged perspeci'ivo of' the needleartnet ing mechenisnn.

remoif'ed from the machine freine with the needle bnr carrier separatedior cleernoss; ll ig. T is im enlarged detail perspective showing theconnect ions between one oi the needle bor carriers and iis Connectingrod, Figs. 7' and 7b ere 'perspectives of other forms oi`-11eedlevibre-l ing com nieclmnism; ond 8 to 20 represent some of the manypatterns ot stitches iormed'by this machine.

A desigmttes the bed of the machine freine, A the goose neck, A2 thehead thereof, A the worl; plete, B the mein shaft, C the needle erm, Cthe connecting rod, which ectinttes the loopers D, and E is the eeddog,end E its rocker. These parts, together with the w presserv bar F, itsfoot Il and hiting com (I are ell shown `in the prior machines of theUnion Special "ype end need not therefore be further described.

H, I, designate two independent horizontelly swinging needle bercarriers pivoted loosely on 'e common vertical exis H2 et the rear etthe heed A2 by Ineens of epertured eers it 'i respectively, andextending forwardly et o posite sides or the presser foot bar F, to theont of the heed A2, where they are provided with needle guiding eyes ht" in which the two needle bers H I ere reciprocated vertically from theneedle arm C, to which they are pivotelly connected by Ineens of twolinks c c; a. screw c3 extending through e. slot c2 in the link c intothe link c/ to allow the necesser-y independent oscillation of thelinks, while connecting them. f

The needle vibrating mechanism comprises e vertical shaft J mounted tovibrate or rock horizontally in e bearing A4 mounted on the goose neckstandard, and provided at its lower end with a crank erm J having aswveled forked block J2, extending down into grooves 1f formed in theperiphery of e cem wheel or disk K mounted on the mein shaft B. The comgrooves 7c ere parallel and straight except et the switch 7c where theycross over ond impart the rocking movement to said crank shaft; theshaft being held stef tionery except when. the switch rocks it elternetelylin opposite directions.

rihe upper end oi the rock shaft J is provided. with o transverse headheving'upper and lower connected curved slotted plates or bers J3, J4,in which are clamped odjustobiy the blocks j", to which the right handends of the two connecting' rods J", J0, are pivotcd. The lett .hemdlends of these rods J", J, :rre pivolnliy end adjustebly connected tolugs ft2, it, on the lfree edges of the needle ber cerriers li, l., soas. to vibrate the carriers and with them the two needles bodily inopposite directions et stated interwils. This adjustahle connectioncomprises eccentric adjustin blocks ja through which clamping screws jextend into the lugs i and h2 to bind seid blocks together. These blocksjs are each provided with si linger piece j 1 by which they ine-y beturned upon. loosening the screws j". The rods Ji', L, ere each providedwith a strep j which turns on the blocks jsend therefore when the screwsare loosened the eccentric blocks or either of them may be lterminesrst, the amount of lateral throwto le and 18, Fig. 13 shows bar carriersH and I and brin their needle bars and needles into or out of line witheach' other. The throw of these needle bar carriers is effected byadjusting the blocks js, f4 in the curvedA arms J 3, J 4.

By adjusting the eccentric blocks js and the blocks ja, 7'4 I am enabledto vary the pattern of the stitches as shown in Figs. S to 20. Forinstance, when the` needle bar carriers and the needle bars carriedthereby are adjusted by the eccentric. adjusting blocks js to bring theneedles in line with'each other, the stitch of one needle will follow inthe path of the other and therefore cause one stitch to overlie theother as shown in Figs. 8, 12, 13 and 17 without regard to theadjustment of the block 7'3 j4. If, however, these eccentrics js are soadjusted as to bring the needle bars out of line from front to rear,then the lines of stitches will be more or less like those shown in Fis.9,10,11,14,15,16,18, 19 and The a justment of the blocks 7'3, 7'4 debegiven the needle bars and being independent of each other, one may beadjusted t0- Wards or from the axis 'of the slotted arms J3, J 4, agreater or less distance than the other and so one needle bar will begiven a greater or less throw than the other and so the zig zag of itsstitch will be greater or less than that of the other. Such differencesin the zig zag being shown in Figs. 10, 11, 12, 13, the stitching wherethe needle bars are in line and one adjusting "tric adjusting blocks js.

block y`3 is on the dead center and so causing the needle to stitch on astraight line, While Fig. 14 shows over Fig. 13, the effect of changingthe adjustment of one of the eccen- YVhen the adjusting blocksj, jt, areboth at the same side of the aXis of the slotted arms J3, J4, thepointsof the stitches will eltend iii the same direction, as shown inFigs.,10, 11, 18 and 20,.but when said blocks are at opposite sides ofsaid axis then the points of the stitches i 7ill project in Oppositedirections, as shown in Figs. 8, 9, 12,

' 15, 16, 17 and 19.

:the'two lines of stitches interlock, would be j very desirable invmaking abutting seams.

In Fig. 7a, cani K, a horizontally turning cam K4 provided in its upperface with a'y cam groove ,t4 into which extends a roller fc5 mounted onthe crank arm J of the vertical needle bar carriers operating rock shaftJ andthis cam K4 is secured to or formed on the upper face of a gear M journaled on the bed A and in mesh with a pinion M on the main shaft.This cam needle bars into and shaft, a needle I employ in lieu oftheswitch K4 is timed to rock the shaft J in like manner to the cam Kbefore described ythe Asmall pinion M rotating twice to one rot'agion ofthe gear M.

In Fig. 7b, which shows my preferred form, the cam K5 is mounted on theupper face of the gear M and is strad dled by a forked crank arm Jlo,having a split at the base of its fork and there provided with a screw Jto draw the arms of the fork together and take up vean Y Y these severalcam mechanisms the parts are so timed and shaped that the needle barcarriersH, I, will be vibrated only when the needles are to be movedbodily in a lateral direction.

The loop taking and feed mechanisms coe operate with the needles in thesame manner as in other Union Special machines.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is

1. A sewing machine comprisingktwo independentA vertically and laterallymovable needle bars, adjusting devices to adjust the out of line, meansfor nnparting independent lateral movement t'o the needle bars,mcans foradjusting the length of stroke of such lateral movement and means forsimultaneously reciprocating the needle bars vertically; substantiallyas described.

2. A sewing machine comprising a driving bar operated thereby, twooscillating needle bar carriers and each having a needle bar mountedtherein and reciprocated simultaneously vertically from the needle arm,a vertical rock shaft operated from the main shaft, and. two connectingrods connecting the said two needle bar carriersA with said verticalrock shaft for oscillation thereby,- substantially as described.

Si. A sewing n'lachine comprising two independent oscillating needle barcarriers and two needle bars respectively reciprocated simultaneouslyvertically on they said carriers, a vertical rocking shaft operativelyconnected to the main shaft and having-'a transverse head on its up` erend, and two connecting rods ad j ustably connected at one end to saidtransverse head and at their opposite ends connected to said needle barcarriers forimparting independentfoscillation thereto; substantially asd cscribed.

4. A'sewing machine comprising two independent oscillating needle b arcarriers, and two needle bars respectively mounted on the two needle barcarriers for simultaneous vertical reciprocation therein, an adjustableeccentric block on each needle carrier, a vertical rocking shaft gearedto the main shaft for operation thereby and connecting rods operativelyconnected at one end to said vertical rock shaft and at their oppositeends strapped to said eccentric needle bar carriers to said adjustableblocks;

5. A sewing machine comprising two independent oscillating needle barcarriers, and two needle bars respectively mounted on the needle barcarriers for simultaneous vertical reciprocation, a vertical rockingshaft geared to the main shaft for operation therefrom and provided atits u per end with slotted arms having adjustah e blocks, and twoconnecting rods connectin the substantially as described.

1 6. A sewing machine comprising two independent, oscillating needle barcarriers, each av'ing an adjustable eccentric blockfbolted thereto, twoneedle bars res ectively mounted on said carriers for simu taneousvertical reciprocation from the needle arm, a vertical rock shaft gearedto the main shaft and provided at its upper end with transverse, slottedarms, adjustable blocks mounted on the sltted arms, and connecting rodsstrapped to the eccentric blocks'at one end and at their other endsconnected to the said adjustable blocks; substantially as described.

l7. A sewing machine comprising two independent horizontallyoscillating'needle ,bar carriers having yrespectively the two needlebars thereon for simultaneous vertical reciprocation, a vertical rockingshaft provided at its upper' end with a transverse head, rods connectingthe two needle bar carriers with said head, a forked crank arm on thelower .end of said vertical rock shaft, a rotary cani stantially asescribed.

-9. A sewing1 v machine comprising two needle bars .an a needle leverforgiving the said bars thelr vertical movements 1n umson,

fa link connection between thelever and the bars, said connectionincludin Aa link between said lever and one of'sai bars, and a secondlink slidably connected to the first link and at its opposite end to thesecond needlebar; substantially as described.

10. A sewin needle bars, an a needle lever for giving said bars theirvertical movements inv unison,

machine comprising two links pivoted at one end to the lever and` at ,Y

the other ends to the respective needle bars, and a slot and pinconnection between the links; substantially as described. n

11. A sewing machine comprising two needle bars, two pivoted needle barcarriers in which the needle bars are guided, and a single shaft uponwhich the needle bar carriers are pivoted the means for o erating saidparts; substantially as described? A 12. A sewing machine com rising afeeding mechanism moving in a efined path, a plurality of needle bars,means for operating said bars, a plurality of needle bar carriersattached to a common center, one of said needle bai` carriers havingholes for the needle bar located farther from the common center than theother; substantially as described.

13. A sewing machine com rising a ieeding mechanism moving in a efinedpath, a plurality of needle bars, means for 'operating said barsseparate needle bar carriers having independent connections with themeans for operating the bars, one of said needle bar carriers beingYarranged 'in a vertical plane in rear of the other with respect to theline of feed; substantially as described.

14. A sewing machine having stitch-forming mechanism includingloop-taking devices and a rotating part," means for giving the latter atwo to one motion with respect to the loop-taking devices, two needlebars, means -for imparting thereto vertical movements,

two independently sup orted needle Abar supports said supports eingnonnted so that vthe lateral vibrations`of thefne `dles may overla andmeans including said ro-\\l for 9`5\.

tating part imparting iateral movements to 'said needle bar supports;substantially as described.

15'. A sewing machine, comprising two independent needle bars, means forimparting simultaneous vertical movement tov sai needle bars, and meansfor imparting independent 'lateral bodily movement to 'said needle bars,said lattermeans including two separate arms or segments and independentconnections between the latter and the needle bars, substantially asdescribed.

In testimony whereof I affix my signature, in presence of two witnesses.

' I iANSlhlGr ONDERDONK. Witnesses:

W. H. Morne, W. E. WEAVER.

